Sewer-inlet grating.



Non-757,049. Y 'PATENTED APR. 12, 1904. L L. H. MINER.

' SEWER INLET. GRATING.

APPLICATION FILED FEB. 11, 1804.

H0 MODEL.

zlfzizzesses:

UNITED STATES Patented April 12, 1904.

PATENT OFFICE.

LOUIS H. MINER, OF HAVERHILL, MASSACHUSETTS, ASSIGNOR TO CHARLES WOLCOTT, OF HAVERHILL, MASSACHUSETTS.

SEWER-INLET GRATING- SPECIFICATION forming part of Letters Patent N0. 757,049, dated April 12, 1904.

Application filed February 11, 1904. Serial No. 193,045. (No model.)

T0 60% whom it may concern.-

Be it known that I, LOUIS H. MINER, of Haverhill, county of Essex, State of Massa chusetts, have invented an Improvement in Sewer-Inlet Gratings, of which the following description,in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a form of grating for the inlet to a sewer, catch-basin, or drainpipe of any sort.

The object of my invention is to provide a form of street or gutter sewer-grating which shall be durable and capable of withstanding severe strain, and yet which will afford a free and nearly unobstructed inlet for the water without increasing the spaces through which objects may pass into the sewer.

In the drawings, Figure 1 is a plan view of a grating made according to my invention. Fig. 2 is a cross-sectional view on the line 00 w of Fig. 1. Fig. 3 is a cross-sectional view on the line y y of Fig. 1.

The frame a of the grating is preferably rectangular or square in form, as shown in Fig. 1, and said frame is provided with a shelf a in each corner, and a pair of shelves (0 are oppositely arranged in the middle of two of the sides of the frame. If the frame is rectangular in form, the shelves a will be formed on its longer sides. Said shelves are all cast integral with the frame, said frame preferably being made of cast-iron.

The grating portion comprises two wroughtiron bars 6, arranged parallel to each other and having obliquely-disposed end portions 6. Said bars are arranged edgewise, and the lower edges of said obliquely-extending ends 6 rest upon said shelves 0, the latter being at such distances below the face of the frame a that the upper edges of the'bars I) will be approximately flush with the face of the frame. I A

series of apertures are formed at regular intervals in the parallel portions of said bars 5 as near their upper edges as feasible, and a series of round cross-rods 0 and a middle rod d have their ends fitted or socketed in said apertures, the ends of said rods being turned down, so that shoulders are provided which this arrangement the grating is solidly supported at each corner and in the middle thereof, so that if the parts are made with reasonable accuracy it cannot tilt, and a rigid support is provided for the grate at all necessary points. As the obliquely-disposed ends of the bars 6 extend into the corners of the frame so that the end of each bar bears against two adjacent sides of the frame, the whole frame is held firmly from horizontal movement in any direction.

By employing wrought-iron bars and rods and by arranging said bars edgewise a grating which will support exceptionally heavy weights for the weight of metal employed is produced.

The parts of the grating may be easily assembled, and While the ends of the shorter rods 0 may be riveted against the outer sides of the bars or screwed therein, and thus securely hold the parts together, yet it is not usually necessary to do this.

With the above-described arrangement four wide-open spaces A are provided at the inner edge of each side of the frame a, said spaces extending nearly throughout the entire length of each side, and as the bars 6 are vertically arranged little or no obstruction is offered to the flow of the water into the sewer-inlet. This is a highly-important feature, for when there are heavy rains and it is necessary for the maximum amount of water to flow through the grating the obstruction to the flow of the water should be as small as possible, and with myarrangement the extent of this obstruction is reduced to a minimum which is consistent with strength and which will obstruct the passage of large objects, which must not be permitted to pass to the sewer.

While square or rectangularshaped rods may be employed in place of the round rods shown, yet I prefer to employ the latter for various reasons.

While the shelves a may be extended beneath the ends of the parallel portions of the bars, yet it is unnecessary to do this in most instances.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A sewer-grating comprising a rectangular frame having a shelf at each corner thereof, a pair of grate-bars having parallel middle portions and obliquely-disposed ends extending into the corners of said frame, and resting on said shelves, and a series of cross-rods connecting the parallel portions of said bars, substantially as described.

2. Asewer-grating comprising a rectangular frame having a, shelf at each corner, a pair of grate-bars having obliquely-disposed end portions extending into the corners of said frame and resting on said shelves, a series of cross-rods connecting the middle portions of said bars, and a pair of shelves on said frame adjacent the middle portions of said bars, one of said cross-rods having its end portions eX- tending through said bars, terminating adjacent the sides of the frame and resting on said last-named shelves, substantially as described.

3. In combination with the rectangular frame of a sewer-inlet, a pair of grate-bars having obliquely-disposed end portions extending into the corners of said frame, supporting-shelves in each corner of the frame on which the ends of said bars rest, and a series of cross-rods having their ends socketed in the portion of said bars between the oblique end portions thereof, substantially as described.

In testimony whereof I have signed my name to this Specification in the presence of two subscribing witnesses.

. LOUIS H. MINER. Witnesses:

L. H. HARRIMAN, H. B. DAVIS. 

